Static recrystallization and mechanical properties of Mg–4Y–3RE magnesium alloy sheet processed by differential speed rolling at 823 K

The microstructural and textural evolution during post-annealing as well as mechanical properties of a Mg–4Y–3RE magnesium alloy sheet processed by differential speed rolling at 823 K were investigated. The as-rolled sheet exhibits deformation microstructure regardless of the high rolling temperature. Static recrystallization occurs around second-phase particles as a result of particle-stimulated nucleation and also at pre-existing grain boundaries due to solute effects of rare-earth elements, resulting in randomization of basal texture. Despite a large amount of second-phase particles, the weakened texture leads to a moderate stretch formability with an Erichsen value of 4.4.